Mobility Management (16 points): Please answer the following subtasks. a. In cell planning for GSM networks, adjacent cells are dimensioned in such a way that their coverage areas overlap. Why is this necessary and which geographical and capacity-related characteristics have to be taken into account during cell planning? Here, you should also explain what needs to be considered when allocating available frequency ranges. (11 points) b. When using mobility support via indirect routing in mobile IP networks, communication connections from the correspondent to the mobile devices are usually routed via the home agent of the mobile device. When is this procedure inefficient, and how can this problem be addressed? (5 points)